I've made such a mess of things, I'm about to cry...
You see, I have two hard disks on my computer: C, which is called System, and D, which is called Data.
Everything goes straight to C, and it was getting filled completely, so I thought I'd move my Sims 3 to the empty D.
But I did it manually (clip and paste with the mouse), and something didn't work.
Then I thought, that I could just delete everything and re-install, starting with the sims 3 base game.
It won't let me. It claims that there is a version already installed, and that I must first remove it, if I wish to install.
I can't find the old version anywhere on hard disks C or D.
If I go to the control panel and pick remove program, sims stuff does appear, but when I then start removal, it tells me that it isn't at that location any more.
It's like it is telling me to remove something that isn't there, and until I do, I can't install anew.
When I go to the Control Panel, there is still a list of sims games, and when I press remove, I get an error message, with this being the reason (fejlkode means error code, fejlinformation means error information):
Fejlkode: -5005 : 0x80070002
PVENDOR:Electronic Arts (http://www.TheSims3.com)
@Windows Vista Service Pack 2 (6002)
IE Version: 9.0.8112.16421